This paper dealt with the effects of Pb 2+,Cd 2+ and their combined pollution on the contents of chlorophyll,potassium and calcium in Thuidium cymbifolium.The results showed that except at 0.1 mg Cd 2+·L -1,the c...This paper dealt with the effects of Pb 2+,Cd 2+ and their combined pollution on the contents of chlorophyll,potassium and calcium in Thuidium cymbifolium.The results showed that except at 0.1 mg Cd 2+·L -1,the chlorophyll content decreased with increasing Pb 2+ and Cd 2+ concentrations,which was 18% of the control at 100 mg Cd 2+·L -1,and decreased by 48.6% at 200 mg Pb 2+·L -1.The potassium and calcium contents also decreased with increasing pollutants concentrations,being decreased by 61.1% at 100 mg Cd 2+·L -1.Cd 2+ had a stronger toxicity than Pb 2+,and the toxicity of their combined pollution was stronger than that of each pollutant.Pb 2+ could increase the toxicity of Cd 2+.展开更多
为探究传统中药大羽藓的形态学特征及挥发性化学成分,以海南黎母山的大羽藓(Thuidium cymbifolium (Dozy et Molk.) Dozy et Molk.)为研究材料,对其形态性状进行了描述,比较了该种与4个近缘种或变种的形态差异,并采用石油醚快速溶剂萃...为探究传统中药大羽藓的形态学特征及挥发性化学成分,以海南黎母山的大羽藓(Thuidium cymbifolium (Dozy et Molk.) Dozy et Molk.)为研究材料,对其形态性状进行了描述,比较了该种与4个近缘种或变种的形态差异,并采用石油醚快速溶剂萃取技术结合GC-MS法对其挥发性物质进行萃取和化学成分分析。共鉴定出31种挥发性成分,占总组分的91.1%,主要成分类型包括酯类(25.48%),萜类(22.64%),酮类(20.64%)及甾醇类(10.61%);主要成分为丁酸丁酯(18.96%)、4-庚酮(10.90%)、角鲨烯(10.75%)和3-甲基-4-庚酮(9.74%)。展开更多
文摘This paper dealt with the effects of Pb 2+,Cd 2+ and their combined pollution on the contents of chlorophyll,potassium and calcium in Thuidium cymbifolium.The results showed that except at 0.1 mg Cd 2+·L -1,the chlorophyll content decreased with increasing Pb 2+ and Cd 2+ concentrations,which was 18% of the control at 100 mg Cd 2+·L -1,and decreased by 48.6% at 200 mg Pb 2+·L -1.The potassium and calcium contents also decreased with increasing pollutants concentrations,being decreased by 61.1% at 100 mg Cd 2+·L -1.Cd 2+ had a stronger toxicity than Pb 2+,and the toxicity of their combined pollution was stronger than that of each pollutant.Pb 2+ could increase the toxicity of Cd 2+.
文摘为探究传统中药大羽藓的形态学特征及挥发性化学成分,以海南黎母山的大羽藓(Thuidium cymbifolium (Dozy et Molk.) Dozy et Molk.)为研究材料,对其形态性状进行了描述,比较了该种与4个近缘种或变种的形态差异,并采用石油醚快速溶剂萃取技术结合GC-MS法对其挥发性物质进行萃取和化学成分分析。共鉴定出31种挥发性成分,占总组分的91.1%,主要成分类型包括酯类(25.48%),萜类(22.64%),酮类(20.64%)及甾醇类(10.61%);主要成分为丁酸丁酯(18.96%)、4-庚酮(10.90%)、角鲨烯(10.75%)和3-甲基-4-庚酮(9.74%)。
